双幅并制箱梁移动模架施工关键技术研究

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Abstract Research purposes:The moving formwork cast-in-situ box girder construction technique has been applied to many projects at home and abroad. At present, it is mainly the single-width moving formwork. In the case of cast-in-situ box girder with double width and small spacing, ordinary conventional single-width moving formwork construction is limited by the beam width, in the construction of the second picture box girder, the formwork cannot be moved longitudinally, and the use scope is limited. Therefore, through the research on the construction technology of the 50 m double-width cast-in-place box girder of Lingkun super bridge of Wenzhou Railway Line S1, this paper aims to form a set of key construction technology of the double-width parallel cast-in-place box girder.
Research conclusions:(1) The finite element calculation results of the key components of the double-width parallel box girder moving formwork are in good agreement with the measured data of the preloading test; (2) The concrete pouring sequence of the moving formwork of double-width parallel box girder is reasonable, and the layout of the pouring equipment, the concrete conveying mode and the longitudinal movement mode of the formwork meet the construction needs; (3) Innovative design of double-width parallel making box girder moving formwork structure, use of folding the inner and outer formwork and bottom formwork for many times, realize the parallel manufacturing of the near distance box girder double beam, and the formwork tail is equipped with transverse adjustment cylinder, which solves the problem of small radius curve passing through holes; (4) The research results can provide reference for the design and construction of other similar projects.

Key words： moving formwork double-width parallel box girder finite element preloading test construction technique

Received: 19 August 2021

PACS:

U445.4

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	WANG Jie
	QIAN Youwei

Cite this article:

WANG Jie,QIAN Youwei. Research on the Key Technology of Construction of Moving Formwork for Double-width Parallel Box Girder[J]. Journal of Railway Engineering Society, 2022, 39(1): 56-60.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I1/56

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